1200945715181 has 2 divisors, whose sum is σ = 1200945715182. Its totient is φ = 1200945715180.

The previous prime is 1200945715163. The next prime is 1200945715213. The reversal of 1200945715181 is 1815175490021.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1040469361156 + 160476354025 = 1020034^2 + 400595^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1200945715181 is a prime.

It is a super-2 number, since 2×1200945715181² (a number of 25 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1200945712181) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 600472857590 + 600472857591.

It is an arithmetic number, because the mean of its divisors is an integer number (600472857591).

Almost surely, 2^{1200945715181} is an apocalyptic number.

It is an amenable number.

1200945715181 is a deficient number, since it is larger than the sum of its proper divisors (1).

1200945715181 is an equidigital number, since it uses as much as digits as its factorization.

1200945715181 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 100800, while the sum is 44.

The spelling of 1200945715181 in words is "one trillion, two hundred billion, nine hundred forty-five million, seven hundred fifteen thousand, one hundred eighty-one".